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Title: Missfire on 2.7TT with K04 Post by: BlackT on August 25, 2021, 12:50:05 PM Short long story. Two stock 2.7TT(ARE and BEL) with K04 and TT 386cc inectors.
When I try to get some boost 1.3-1.4 bar I get missfire. I hold it about 0.75-0.8 lambda Spark plugs new are from RS4 NGK 7Q , coils have about 10-15k Do I need to play with spark plug gap or something else? I never have much problem on 1.8T with missfire, even with older plugs and coils. So I don't understand why these two 2.7 make such problem. Also with some other stock 2.7 I have some missfire, like the parts(plugs and coils) need to be in better condition than on 1.8T with same HP per cil. Title: Re: Missfire on 2.7TT with K04 Post by: vwaudiguy on August 25, 2021, 11:45:27 PM What are your plugs currently gapped to?
Title: Re: Missfire on 2.7TT with K04 Post by: BlackT on August 30, 2021, 12:05:34 AM 0.75 mm
Title: Re: Missfire on 2.7TT with K04 Post by: vwaudiguy on August 30, 2021, 12:29:07 PM Try going down to .022-.024"
Title: Re: Missfire on 2.7TT with K04 Post by: thedrill on August 30, 2021, 12:40:00 PM You dont need expensive spark plugs on the 2.7t motors , The motor is happy with cheap NGK BKR7E copper plugs gapped at 24 thou, if you are running any kind of higher boost.
Title: Re: Missfire on 2.7TT with K04 Post by: BlackT on August 31, 2021, 01:46:08 PM Coil problem, strange, on both engine coils fail after I put more boost. After that even on stock boost they make missfire
I am putting NGK U5013 on both engines. Title: Re: Missfire on 2.7TT with K04 Post by: Blazius on August 31, 2021, 03:00:07 PM Coil problem, strange, on both engine coils fail after I put more boost. After that even on stock boost they make missfire I am putting NGK U5013 on both engines. What coils are you running,tfsi ? Btw rs6 coils have bigger heatsinks and coils than tfsi coils afaik, if you wanna give em a go. Title: Re: Missfire on 2.7TT with K04 Post by: prj on September 01, 2021, 07:21:03 AM If the coils are TFSI converted then the dwell time needs adjusting, otherwise the coils will blow very fast, as the dwell time is almost double that it should be.
Title: Re: Missfire on 2.7TT with K04 Post by: BlackT on September 13, 2021, 12:26:34 AM Yes I know about dwell time
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